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    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
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  <body>
    <script>
      const flag = prompt("请输入一个数字", 0);

      if (+flag === 1) console.log(1);

      if (+flag >= 4) {
        console.log(4);
        console.log(5);
        console.log(6);
      }

      if (+flag === 4) {
        console.log(7);
        console.log(7);
        console.log(7);
        console.log(7);
      }
    </script>
  </body>
</html>
